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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _NET_XFRM_H |
2 | #define _NET_XFRM_H | |
3 | ||
aabc9761 | 4 | #include <linux/compiler.h> |
14c85021 | 5 | #include <linux/in.h> |
1da177e4 LT |
6 | #include <linux/xfrm.h> |
7 | #include <linux/spinlock.h> | |
8 | #include <linux/list.h> | |
9 | #include <linux/skbuff.h> | |
14c85021 | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/pfkeyv2.h> |
5794708f | 12 | #include <linux/ipsec.h> |
1da177e4 | 13 | #include <linux/in6.h> |
4a3e2f71 | 14 | #include <linux/mutex.h> |
ab5f5e8b | 15 | #include <linux/audit.h> |
1da177e4 LT |
16 | |
17 | #include <net/sock.h> | |
18 | #include <net/dst.h> | |
19 | #include <net/route.h> | |
20 | #include <net/ipv6.h> | |
21 | #include <net/ip6_fib.h> | |
22 | ||
d3d6dd3a MN |
23 | #define XFRM_PROTO_ESP 50 |
24 | #define XFRM_PROTO_AH 51 | |
25 | #define XFRM_PROTO_COMP 108 | |
26 | #define XFRM_PROTO_IPIP 4 | |
27 | #define XFRM_PROTO_IPV6 41 | |
28 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
29 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
30 | ||
1da177e4 | 31 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
32 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
33 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
34 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
35 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 36 | |
f8cd5488 JHS |
37 | extern struct sock *xfrm_nl; |
38 | extern u32 sysctl_xfrm_aevent_etime; | |
39 | extern u32 sysctl_xfrm_aevent_rseqth; | |
40 | ||
4a3e2f71 | 41 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
42 | |
43 | /* Organization of SPD aka "XFRM rules" | |
44 | ------------------------------------ | |
45 | ||
46 | Basic objects: | |
47 | - policy rule, struct xfrm_policy (=SPD entry) | |
48 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
49 | - instance of a transformer, struct xfrm_state (=SA) | |
50 | - template to clone xfrm_state, struct xfrm_tmpl | |
51 | ||
52 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
53 | (To be compatible with existing pfkeyv2 implementations, | |
54 | many rules with priority of 0x7fffffff are allowed to exist and | |
55 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
56 | ||
57 | Lookup is plain linear search until the first match with selector. | |
58 | ||
59 | If "action" is "block", then we prohibit the flow, otherwise: | |
60 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
61 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
62 | described by templates xfrm_tmpl. Each template is resolved | |
63 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
64 | to a dst_entry returned to requestor. | |
65 | ||
66 | dst -. xfrm .-> xfrm_state #1 | |
67 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
68 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
69 | |---. child .-> NULL | |
70 | ||
71 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
72 | ||
73 | ||
74 | Resolution of xrfm_tmpl | |
75 | ----------------------- | |
76 | Template contains: | |
77 | 1. ->mode Mode: transport or tunnel | |
78 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
79 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
80 | Q: allow to resolve security gateway? | |
81 | 4. ->id.spi If not zero, static SPI. | |
82 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
83 | 6. ->algos List of allowed algos. Plain bitmask now. | |
84 | Q: ealgos, aalgos, calgos. What a mess... | |
85 | 7. ->share Sharing mode. | |
86 | Q: how to implement private sharing mode? To add struct sock* to | |
87 | flow id? | |
88 | ||
89 | Having this template we search through SAD searching for entries | |
90 | with appropriate mode/proto/algo, permitted by selector. | |
91 | If no appropriate entry found, it is requested from key manager. | |
92 | ||
93 | PROBLEMS: | |
94 | Q: How to find all the bundles referring to a physical path for | |
95 | PMTU discovery? Seems, dst should contain list of all parents... | |
96 | and enter to infinite locking hierarchy disaster. | |
97 | No! It is easier, we will not search for them, let them find us. | |
98 | We add genid to each dst plus pointer to genid of raw IP route, | |
99 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
100 | dst_check() will see this for top level and trigger resyncing | |
101 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
102 | */ | |
103 | ||
104 | /* Full description of state of transformer. */ | |
105 | struct xfrm_state | |
106 | { | |
107 | /* Note: bydst is re-used during gc */ | |
8f126e37 DM |
108 | struct hlist_node bydst; |
109 | struct hlist_node bysrc; | |
110 | struct hlist_node byspi; | |
1da177e4 LT |
111 | |
112 | atomic_t refcnt; | |
113 | spinlock_t lock; | |
114 | ||
115 | struct xfrm_id id; | |
116 | struct xfrm_selector sel; | |
117 | ||
9d4a706d DM |
118 | u32 genid; |
119 | ||
1da177e4 LT |
120 | /* Key manger bits */ |
121 | struct { | |
122 | u8 state; | |
123 | u8 dying; | |
124 | u32 seq; | |
125 | } km; | |
126 | ||
127 | /* Parameters of this state. */ | |
128 | struct { | |
129 | u32 reqid; | |
130 | u8 mode; | |
131 | u8 replay_window; | |
132 | u8 aalgo, ealgo, calgo; | |
133 | u8 flags; | |
134 | u16 family; | |
135 | xfrm_address_t saddr; | |
136 | int header_len; | |
137 | int trailer_len; | |
138 | } props; | |
139 | ||
140 | struct xfrm_lifetime_cfg lft; | |
141 | ||
142 | /* Data for transformer */ | |
143 | struct xfrm_algo *aalg; | |
144 | struct xfrm_algo *ealg; | |
145 | struct xfrm_algo *calg; | |
146 | ||
147 | /* Data for encapsulator */ | |
148 | struct xfrm_encap_tmpl *encap; | |
149 | ||
060f02a3 NT |
150 | /* Data for care-of address */ |
151 | xfrm_address_t *coaddr; | |
152 | ||
1da177e4 LT |
153 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
154 | struct xfrm_state *tunnel; | |
155 | ||
156 | /* If a tunnel, number of users + 1 */ | |
157 | atomic_t tunnel_users; | |
158 | ||
159 | /* State for replay detection */ | |
160 | struct xfrm_replay_state replay; | |
161 | ||
f8cd5488 JHS |
162 | /* Replay detection state at the time we sent the last notification */ |
163 | struct xfrm_replay_state preplay; | |
164 | ||
2717096a JHS |
165 | /* internal flag that only holds state for delayed aevent at the |
166 | * moment | |
167 | */ | |
168 | u32 xflags; | |
169 | ||
f8cd5488 JHS |
170 | /* Replay detection notification settings */ |
171 | u32 replay_maxage; | |
172 | u32 replay_maxdiff; | |
173 | ||
174 | /* Replay detection notification timer */ | |
175 | struct timer_list rtimer; | |
176 | ||
1da177e4 LT |
177 | /* Statistics */ |
178 | struct xfrm_stats stats; | |
179 | ||
180 | struct xfrm_lifetime_cur curlft; | |
181 | struct timer_list timer; | |
182 | ||
9afaca05 MN |
183 | /* Last used time */ |
184 | u64 lastused; | |
185 | ||
1da177e4 LT |
186 | /* Reference to data common to all the instances of this |
187 | * transformer. */ | |
188 | struct xfrm_type *type; | |
b59f45d0 | 189 | struct xfrm_mode *mode; |
1da177e4 | 190 | |
df71837d TJ |
191 | /* Security context */ |
192 | struct xfrm_sec_ctx *security; | |
193 | ||
1da177e4 LT |
194 | /* Private data of this transformer, format is opaque, |
195 | * interpreted by xfrm_type methods. */ | |
196 | void *data; | |
197 | }; | |
198 | ||
2717096a JHS |
199 | /* xflags - make enum if more show up */ |
200 | #define XFRM_TIME_DEFER 1 | |
201 | ||
1da177e4 LT |
202 | enum { |
203 | XFRM_STATE_VOID, | |
204 | XFRM_STATE_ACQ, | |
205 | XFRM_STATE_VALID, | |
206 | XFRM_STATE_ERROR, | |
207 | XFRM_STATE_EXPIRED, | |
208 | XFRM_STATE_DEAD | |
209 | }; | |
210 | ||
26b15dad JHS |
211 | /* callback structure passed from either netlink or pfkey */ |
212 | struct km_event | |
213 | { | |
bf08867f HX |
214 | union { |
215 | u32 hard; | |
216 | u32 proto; | |
217 | u32 byid; | |
f8cd5488 | 218 | u32 aevent; |
f7b6983f | 219 | u32 type; |
bf08867f HX |
220 | } data; |
221 | ||
26b15dad JHS |
222 | u32 seq; |
223 | u32 pid; | |
224 | u32 event; | |
225 | }; | |
226 | ||
1da177e4 LT |
227 | struct xfrm_type; |
228 | struct xfrm_dst; | |
229 | struct xfrm_policy_afinfo { | |
230 | unsigned short family; | |
73654d61 | 231 | struct xfrm_type *type_map[IPPROTO_MAX]; |
b59f45d0 | 232 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
1da177e4 LT |
233 | struct dst_ops *dst_ops; |
234 | void (*garbage_collect)(void); | |
235 | int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); | |
a1e59abf | 236 | int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 LT |
237 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
238 | int (*bundle_create)(struct xfrm_policy *policy, | |
239 | struct xfrm_state **xfrm, | |
240 | int nx, | |
241 | struct flowi *fl, | |
242 | struct dst_entry **dst_p); | |
243 | void (*decode_session)(struct sk_buff *skb, | |
244 | struct flowi *fl); | |
245 | }; | |
246 | ||
247 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
248 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
249 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
250 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
251 | |
252 | struct xfrm_tmpl; | |
980ebd25 | 253 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
254 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
255 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
256 | ||
1da177e4 LT |
257 | struct xfrm_state_afinfo { |
258 | unsigned short family; | |
d094cd83 | 259 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
260 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
261 | struct xfrm_tmpl *tmpl, | |
262 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
263 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
264 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 265 | int (*output)(struct sk_buff *skb); |
1da177e4 LT |
266 | }; |
267 | ||
268 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
269 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
cdca7265 MK |
270 | extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family); |
271 | extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 LT |
272 | |
273 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
274 | ||
1da177e4 LT |
275 | struct xfrm_type |
276 | { | |
277 | char *description; | |
278 | struct module *owner; | |
279 | __u8 proto; | |
1b5c2299 MN |
280 | __u8 flags; |
281 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
1da177e4 | 282 | |
72cb6962 | 283 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 284 | void (*destructor)(struct xfrm_state *); |
e695633e | 285 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 286 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 287 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 288 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
99505a84 MN |
289 | xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); |
290 | xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); | |
1da177e4 | 291 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 292 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
293 | }; |
294 | ||
1da177e4 LT |
295 | extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); |
296 | extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); | |
297 | extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); | |
298 | extern void xfrm_put_type(struct xfrm_type *type); | |
299 | ||
b59f45d0 HX |
300 | struct xfrm_mode { |
301 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); | |
eb878e84 | 302 | int (*output)(struct xfrm_state *x,struct sk_buff *skb); |
b59f45d0 HX |
303 | |
304 | struct module *owner; | |
305 | unsigned int encap; | |
306 | }; | |
307 | ||
308 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
309 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
310 | extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); | |
311 | extern void xfrm_put_mode(struct xfrm_mode *mode); | |
312 | ||
1da177e4 LT |
313 | struct xfrm_tmpl |
314 | { | |
315 | /* id in template is interpreted as: | |
316 | * daddr - destination of tunnel, may be zero for transport mode. | |
317 | * spi - zero to acquire spi. Not zero if spi is static, then | |
318 | * daddr must be fixed too. | |
319 | * proto - AH/ESP/IPCOMP | |
320 | */ | |
321 | struct xfrm_id id; | |
322 | ||
323 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
324 | xfrm_address_t saddr; | |
325 | ||
76b3f055 MK |
326 | unsigned short encap_family; |
327 | ||
1da177e4 LT |
328 | __u32 reqid; |
329 | ||
7e49e6de | 330 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
331 | __u8 mode; |
332 | ||
333 | /* Sharing mode: unique, this session only, this user only etc. */ | |
334 | __u8 share; | |
335 | ||
336 | /* May skip this transfomration if no SA is found */ | |
337 | __u8 optional; | |
338 | ||
339 | /* Bit mask of algos allowed for acquisition */ | |
340 | __u32 aalgos; | |
341 | __u32 ealgos; | |
342 | __u32 calgos; | |
343 | }; | |
344 | ||
622dc828 | 345 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
346 | |
347 | struct xfrm_policy | |
348 | { | |
349 | struct xfrm_policy *next; | |
2518c7c2 DM |
350 | struct hlist_node bydst; |
351 | struct hlist_node byidx; | |
1da177e4 LT |
352 | |
353 | /* This lock only affects elements except for entry. */ | |
354 | rwlock_t lock; | |
355 | atomic_t refcnt; | |
356 | struct timer_list timer; | |
357 | ||
358 | u32 priority; | |
359 | u32 index; | |
360 | struct xfrm_selector selector; | |
361 | struct xfrm_lifetime_cfg lft; | |
362 | struct xfrm_lifetime_cur curlft; | |
363 | struct dst_entry *bundles; | |
46ca5f5d ACM |
364 | u16 family; |
365 | u8 type; | |
366 | u8 action; | |
367 | u8 flags; | |
368 | u8 dead; | |
369 | u8 xfrm_nr; | |
370 | /* XXX 1 byte hole, try to pack */ | |
df71837d | 371 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
372 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
373 | }; | |
374 | ||
80c9abaa SS |
375 | struct xfrm_migrate { |
376 | xfrm_address_t old_daddr; | |
377 | xfrm_address_t old_saddr; | |
378 | xfrm_address_t new_daddr; | |
379 | xfrm_address_t new_saddr; | |
380 | u8 proto; | |
381 | u8 mode; | |
382 | u16 reserved; | |
383 | u32 reqid; | |
384 | u16 old_family; | |
385 | u16 new_family; | |
386 | }; | |
387 | ||
f8cd5488 JHS |
388 | #define XFRM_KM_TIMEOUT 30 |
389 | /* which seqno */ | |
390 | #define XFRM_REPLAY_SEQ 1 | |
391 | #define XFRM_REPLAY_OSEQ 2 | |
392 | #define XFRM_REPLAY_SEQ_MASK 3 | |
393 | /* what happened */ | |
394 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
395 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
396 | ||
397 | /* default aevent timeout in units of 100ms */ | |
398 | #define XFRM_AE_ETIME 10 | |
399 | /* Async Event timer multiplier */ | |
400 | #define XFRM_AE_ETH_M 10 | |
401 | /* default seq threshold size */ | |
402 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
403 | |
404 | struct xfrm_mgr | |
405 | { | |
406 | struct list_head list; | |
407 | char *id; | |
26b15dad | 408 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 409 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 410 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 411 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 412 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 413 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
80c9abaa | 414 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
1da177e4 LT |
415 | }; |
416 | ||
417 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
418 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
419 | ||
2518c7c2 | 420 | extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
1da177e4 | 421 | |
161a09e7 JL |
422 | /* Audit Information */ |
423 | struct xfrm_audit | |
424 | { | |
ab5f5e8b | 425 | u32 loginuid; |
161a09e7 JL |
426 | u32 secid; |
427 | }; | |
c9204d9c JL |
428 | |
429 | #ifdef CONFIG_AUDITSYSCALL | |
ab5f5e8b JL |
430 | static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) |
431 | { | |
432 | struct audit_buffer *audit_buf = NULL; | |
433 | char *secctx; | |
434 | u32 secctx_len; | |
435 | ||
436 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, | |
437 | AUDIT_MAC_IPSEC_EVENT); | |
438 | if (audit_buf == NULL) | |
439 | return NULL; | |
440 | ||
441 | audit_log_format(audit_buf, "auid=%u", auid); | |
442 | ||
443 | if (sid != 0 && | |
444 | security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { | |
445 | audit_log_format(audit_buf, " subj=%s", secctx); | |
446 | security_release_secctx(secctx, secctx_len); | |
447 | } else | |
448 | audit_log_task_context(audit_buf); | |
449 | return audit_buf; | |
450 | } | |
451 | ||
452 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
453 | u32 auid, u32 sid); | |
454 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
455 | u32 auid, u32 sid); | |
456 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
457 | u32 auid, u32 sid); | |
458 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
459 | u32 auid, u32 sid); | |
c9204d9c | 460 | #else |
ab5f5e8b JL |
461 | #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) |
462 | #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) | |
463 | #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) | |
464 | #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) | |
c9204d9c | 465 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 466 | |
1da177e4 LT |
467 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
468 | { | |
469 | if (likely(policy != NULL)) | |
470 | atomic_inc(&policy->refcnt); | |
471 | } | |
472 | ||
473 | extern void __xfrm_policy_destroy(struct xfrm_policy *policy); | |
474 | ||
475 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
476 | { | |
477 | if (atomic_dec_and_test(&policy->refcnt)) | |
478 | __xfrm_policy_destroy(policy); | |
479 | } | |
480 | ||
4e81bb83 MN |
481 | #ifdef CONFIG_XFRM_SUB_POLICY |
482 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
483 | { | |
484 | int i; | |
485 | for (i = npols - 1; i >= 0; --i) | |
486 | xfrm_pol_put(pols[i]); | |
487 | } | |
488 | #else | |
489 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
490 | { | |
491 | xfrm_pol_put(pols[0]); | |
492 | } | |
493 | #endif | |
494 | ||
1da177e4 LT |
495 | extern void __xfrm_state_destroy(struct xfrm_state *); |
496 | ||
21380b81 HX |
497 | static inline void __xfrm_state_put(struct xfrm_state *x) |
498 | { | |
499 | atomic_dec(&x->refcnt); | |
500 | } | |
501 | ||
1da177e4 LT |
502 | static inline void xfrm_state_put(struct xfrm_state *x) |
503 | { | |
504 | if (atomic_dec_and_test(&x->refcnt)) | |
505 | __xfrm_state_destroy(x); | |
506 | } | |
507 | ||
508 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
509 | { | |
510 | atomic_inc(&x->refcnt); | |
511 | } | |
512 | ||
513 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
514 | { | |
5f19343f AV |
515 | __be32 *a1 = token1; |
516 | __be32 *a2 = token2; | |
1da177e4 LT |
517 | int pdw; |
518 | int pbi; | |
519 | ||
520 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
521 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
522 | ||
523 | if (pdw) | |
524 | if (memcmp(a1, a2, pdw << 2)) | |
525 | return 0; | |
526 | ||
527 | if (pbi) { | |
5f19343f | 528 | __be32 mask; |
1da177e4 LT |
529 | |
530 | mask = htonl((0xffffffff) << (32 - pbi)); | |
531 | ||
532 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
533 | return 0; | |
534 | } | |
535 | ||
536 | return 1; | |
537 | } | |
538 | ||
539 | static __inline__ | |
f9d07e41 | 540 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 541 | { |
f9d07e41 | 542 | __be16 port; |
1da177e4 LT |
543 | switch(fl->proto) { |
544 | case IPPROTO_TCP: | |
545 | case IPPROTO_UDP: | |
ba4e58ec | 546 | case IPPROTO_UDPLITE: |
1da177e4 LT |
547 | case IPPROTO_SCTP: |
548 | port = fl->fl_ip_sport; | |
549 | break; | |
550 | case IPPROTO_ICMP: | |
551 | case IPPROTO_ICMPV6: | |
552 | port = htons(fl->fl_icmp_type); | |
553 | break; | |
2ce4272a MN |
554 | case IPPROTO_MH: |
555 | port = htons(fl->fl_mh_type); | |
556 | break; | |
1da177e4 LT |
557 | default: |
558 | port = 0; /*XXX*/ | |
559 | } | |
560 | return port; | |
561 | } | |
562 | ||
563 | static __inline__ | |
f9d07e41 | 564 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 565 | { |
f9d07e41 | 566 | __be16 port; |
1da177e4 LT |
567 | switch(fl->proto) { |
568 | case IPPROTO_TCP: | |
569 | case IPPROTO_UDP: | |
ba4e58ec | 570 | case IPPROTO_UDPLITE: |
1da177e4 LT |
571 | case IPPROTO_SCTP: |
572 | port = fl->fl_ip_dport; | |
573 | break; | |
574 | case IPPROTO_ICMP: | |
575 | case IPPROTO_ICMPV6: | |
576 | port = htons(fl->fl_icmp_code); | |
577 | break; | |
578 | default: | |
579 | port = 0; /*XXX*/ | |
580 | } | |
581 | return port; | |
582 | } | |
583 | ||
77681021 AM |
584 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
585 | unsigned short family); | |
1da177e4 | 586 | |
df71837d TJ |
587 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
588 | /* If neither has a context --> match | |
589 | * Otherwise, both must have a context and the sids, doi, alg must match | |
590 | */ | |
591 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
592 | { | |
593 | return ((!s1 && !s2) || | |
594 | (s1 && s2 && | |
595 | (s1->ctx_sid == s2->ctx_sid) && | |
596 | (s1->ctx_doi == s2->ctx_doi) && | |
597 | (s1->ctx_alg == s2->ctx_alg))); | |
598 | } | |
599 | #else | |
600 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
601 | { | |
602 | return 1; | |
603 | } | |
604 | #endif | |
605 | ||
1da177e4 LT |
606 | /* A struct encoding bundle of transformations to apply to some set of flow. |
607 | * | |
608 | * dst->child points to the next element of bundle. | |
609 | * dst->xfrm points to an instanse of transformer. | |
610 | * | |
611 | * Due to unfortunate limitations of current routing cache, which we | |
612 | * have no time to fix, it mirrors struct rtable and bound to the same | |
613 | * routing key, including saddr,daddr. However, we can have many of | |
614 | * bundles differing by session id. All the bundles grow from a parent | |
615 | * policy rule. | |
616 | */ | |
617 | struct xfrm_dst | |
618 | { | |
619 | union { | |
1da177e4 LT |
620 | struct dst_entry dst; |
621 | struct rtable rt; | |
622 | struct rt6_info rt6; | |
623 | } u; | |
624 | struct dst_entry *route; | |
157bfc25 MN |
625 | #ifdef CONFIG_XFRM_SUB_POLICY |
626 | struct flowi *origin; | |
627 | struct xfrm_selector *partner; | |
628 | #endif | |
9d4a706d | 629 | u32 genid; |
1da177e4 LT |
630 | u32 route_mtu_cached; |
631 | u32 child_mtu_cached; | |
92d63dec HY |
632 | u32 route_cookie; |
633 | u32 path_cookie; | |
1da177e4 LT |
634 | }; |
635 | ||
aabc9761 HX |
636 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
637 | { | |
638 | dst_release(xdst->route); | |
639 | if (likely(xdst->u.dst.xfrm)) | |
640 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
641 | #ifdef CONFIG_XFRM_SUB_POLICY |
642 | kfree(xdst->origin); | |
643 | xdst->origin = NULL; | |
644 | kfree(xdst->partner); | |
645 | xdst->partner = NULL; | |
646 | #endif | |
aabc9761 HX |
647 | } |
648 | ||
649 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
650 | ||
1da177e4 LT |
651 | struct sec_path |
652 | { | |
653 | atomic_t refcnt; | |
654 | int len; | |
dbe5b4aa | 655 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
656 | }; |
657 | ||
658 | static inline struct sec_path * | |
659 | secpath_get(struct sec_path *sp) | |
660 | { | |
661 | if (sp) | |
662 | atomic_inc(&sp->refcnt); | |
663 | return sp; | |
664 | } | |
665 | ||
666 | extern void __secpath_destroy(struct sec_path *sp); | |
667 | ||
668 | static inline void | |
669 | secpath_put(struct sec_path *sp) | |
670 | { | |
671 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
672 | __secpath_destroy(sp); | |
673 | } | |
674 | ||
675 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
676 | ||
677 | static inline void | |
678 | secpath_reset(struct sk_buff *skb) | |
679 | { | |
680 | #ifdef CONFIG_XFRM | |
681 | secpath_put(skb->sp); | |
682 | skb->sp = NULL; | |
683 | #endif | |
684 | } | |
685 | ||
a1e59abf PM |
686 | static inline int |
687 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
688 | { | |
689 | switch (family) { | |
690 | case AF_INET: | |
691 | return addr->a4 == 0; | |
692 | case AF_INET6: | |
693 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
694 | } | |
695 | return 0; | |
696 | } | |
697 | ||
1da177e4 LT |
698 | static inline int |
699 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
700 | { | |
701 | return (tmpl->saddr.a4 && | |
702 | tmpl->saddr.a4 != x->props.saddr.a4); | |
703 | } | |
704 | ||
705 | static inline int | |
706 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
707 | { | |
708 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
709 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
710 | } | |
711 | ||
712 | static inline int | |
713 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
714 | { | |
715 | switch (family) { | |
716 | case AF_INET: | |
717 | return __xfrm4_state_addr_cmp(tmpl, x); | |
718 | case AF_INET6: | |
719 | return __xfrm6_state_addr_cmp(tmpl, x); | |
720 | } | |
721 | return !0; | |
722 | } | |
723 | ||
724 | #ifdef CONFIG_XFRM | |
725 | ||
726 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); | |
727 | ||
728 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
729 | { | |
730 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
731 | return __xfrm_policy_check(sk, dir, skb, family); | |
4e81bb83 | 732 | |
2518c7c2 | 733 | return (!xfrm_policy_count[dir] && !skb->sp) || |
1da177e4 LT |
734 | (skb->dst->flags & DST_NOPOLICY) || |
735 | __xfrm_policy_check(sk, dir, skb, family); | |
736 | } | |
737 | ||
738 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
739 | { | |
740 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
741 | } | |
742 | ||
743 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
744 | { | |
745 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
746 | } | |
747 | ||
3e3850e9 | 748 | extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
1da177e4 LT |
749 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
750 | ||
751 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
752 | { | |
2518c7c2 | 753 | return !xfrm_policy_count[XFRM_POLICY_OUT] || |
1da177e4 LT |
754 | (skb->dst->flags & DST_NOXFRM) || |
755 | __xfrm_route_forward(skb, family); | |
756 | } | |
757 | ||
758 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
759 | { | |
760 | return xfrm_route_forward(skb, AF_INET); | |
761 | } | |
762 | ||
763 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
764 | { | |
765 | return xfrm_route_forward(skb, AF_INET6); | |
766 | } | |
767 | ||
768 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
769 | ||
770 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
771 | { | |
772 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
773 | return __xfrm_sk_clone_policy(sk); | |
774 | return 0; | |
775 | } | |
776 | ||
4666faab | 777 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
778 | |
779 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
780 | { | |
781 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
782 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
783 | sk->sk_policy[0] = NULL; | |
784 | } | |
785 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
786 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
787 | sk->sk_policy[1] = NULL; | |
788 | } | |
789 | } | |
790 | ||
791 | #else | |
792 | ||
793 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
794 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
795 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
796 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
797 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
798 | { | |
799 | return 1; | |
800 | } | |
801 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
802 | { | |
803 | return 1; | |
804 | } | |
805 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
806 | { | |
807 | return 1; | |
808 | } | |
809 | #endif | |
810 | ||
811 | static __inline__ | |
812 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
813 | { | |
814 | switch (family){ | |
815 | case AF_INET: | |
816 | return (xfrm_address_t *)&fl->fl4_dst; | |
817 | case AF_INET6: | |
818 | return (xfrm_address_t *)&fl->fl6_dst; | |
819 | } | |
820 | return NULL; | |
821 | } | |
822 | ||
823 | static __inline__ | |
824 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
825 | { | |
826 | switch (family){ | |
827 | case AF_INET: | |
828 | return (xfrm_address_t *)&fl->fl4_src; | |
829 | case AF_INET6: | |
830 | return (xfrm_address_t *)&fl->fl6_src; | |
831 | } | |
832 | return NULL; | |
833 | } | |
834 | ||
835 | static __inline__ int | |
836 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
837 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
838 | { | |
839 | if (daddr->a4 == x->id.daddr.a4 && | |
840 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
841 | return 1; | |
842 | return 0; | |
843 | } | |
844 | ||
845 | static __inline__ int | |
846 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
847 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
848 | { | |
849 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
850 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
851 | ipv6_addr_any((struct in6_addr *)saddr) || | |
852 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
853 | return 1; | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static __inline__ int | |
858 | xfrm_state_addr_check(struct xfrm_state *x, | |
859 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
860 | unsigned short family) | |
861 | { | |
862 | switch (family) { | |
863 | case AF_INET: | |
864 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
865 | case AF_INET6: | |
866 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
867 | } | |
868 | return 0; | |
869 | } | |
870 | ||
e53820de MN |
871 | static __inline__ int |
872 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
873 | unsigned short family) | |
874 | { | |
875 | switch (family) { | |
876 | case AF_INET: | |
877 | return __xfrm4_state_addr_check(x, | |
878 | (xfrm_address_t *)&fl->fl4_dst, | |
879 | (xfrm_address_t *)&fl->fl4_src); | |
880 | case AF_INET6: | |
881 | return __xfrm6_state_addr_check(x, | |
882 | (xfrm_address_t *)&fl->fl6_dst, | |
883 | (xfrm_address_t *)&fl->fl6_src); | |
884 | } | |
885 | return 0; | |
886 | } | |
887 | ||
1da177e4 LT |
888 | static inline int xfrm_state_kern(struct xfrm_state *x) |
889 | { | |
890 | return atomic_read(&x->tunnel_users); | |
891 | } | |
892 | ||
5794708f MN |
893 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
894 | { | |
dc00a525 MN |
895 | return (!userproto || proto == userproto || |
896 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
897 | proto == IPPROTO_ESP || | |
898 | proto == IPPROTO_COMP))); | |
5794708f MN |
899 | } |
900 | ||
1da177e4 LT |
901 | /* |
902 | * xfrm algorithm information | |
903 | */ | |
904 | struct xfrm_algo_auth_info { | |
905 | u16 icv_truncbits; | |
906 | u16 icv_fullbits; | |
907 | }; | |
908 | ||
909 | struct xfrm_algo_encr_info { | |
910 | u16 blockbits; | |
911 | u16 defkeybits; | |
912 | }; | |
913 | ||
914 | struct xfrm_algo_comp_info { | |
915 | u16 threshold; | |
916 | }; | |
917 | ||
918 | struct xfrm_algo_desc { | |
919 | char *name; | |
04ff1260 | 920 | char *compat; |
1da177e4 LT |
921 | u8 available:1; |
922 | union { | |
923 | struct xfrm_algo_auth_info auth; | |
924 | struct xfrm_algo_encr_info encr; | |
925 | struct xfrm_algo_comp_info comp; | |
926 | } uinfo; | |
927 | struct sadb_alg desc; | |
928 | }; | |
929 | ||
930 | /* XFRM tunnel handlers. */ | |
931 | struct xfrm_tunnel { | |
932 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
933 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
934 | ||
935 | struct xfrm_tunnel *next; | |
936 | int priority; | |
1da177e4 LT |
937 | }; |
938 | ||
939 | struct xfrm6_tunnel { | |
d2acc347 HX |
940 | int (*handler)(struct sk_buff *skb); |
941 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 942 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
943 | struct xfrm6_tunnel *next; |
944 | int priority; | |
1da177e4 LT |
945 | }; |
946 | ||
947 | extern void xfrm_init(void); | |
948 | extern void xfrm4_init(void); | |
949 | extern void xfrm6_init(void); | |
950 | extern void xfrm6_fini(void); | |
951 | extern void xfrm_state_init(void); | |
952 | extern void xfrm4_state_init(void); | |
1da177e4 LT |
953 | extern void xfrm6_state_init(void); |
954 | extern void xfrm6_state_fini(void); | |
955 | ||
956 | extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); | |
957 | extern struct xfrm_state *xfrm_state_alloc(void); | |
958 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
959 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
960 | struct xfrm_policy *pol, int *err, | |
961 | unsigned short family); | |
628529b6 JHS |
962 | extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, |
963 | xfrm_address_t *saddr, | |
964 | unsigned short family, | |
965 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
966 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
967 | extern void xfrm_state_insert(struct xfrm_state *x); | |
968 | extern int xfrm_state_add(struct xfrm_state *x); | |
969 | extern int xfrm_state_update(struct xfrm_state *x); | |
a94cfd19 | 970 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
eb2971b6 | 971 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
41a49cc3 MN |
972 | #ifdef CONFIG_XFRM_SUB_POLICY |
973 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
974 | int n, unsigned short family); | |
975 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
976 | int n, unsigned short family); | |
977 | #else | |
978 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
979 | int n, unsigned short family) | |
980 | { | |
981 | return -ENOSYS; | |
982 | } | |
983 | ||
984 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
985 | int n, unsigned short family) | |
986 | { | |
987 | return -ENOSYS; | |
988 | } | |
989 | #endif | |
af11e316 JHS |
990 | |
991 | struct xfrmk_sadinfo { | |
992 | u32 sadhcnt; /* current hash bkts */ | |
993 | u32 sadhmcnt; /* max allowed hash bkts */ | |
994 | u32 sadcnt; /* current running count */ | |
995 | }; | |
996 | ||
5a6d3416 JHS |
997 | struct xfrmk_spdinfo { |
998 | u32 incnt; | |
999 | u32 outcnt; | |
1000 | u32 fwdcnt; | |
1001 | u32 inscnt; | |
1002 | u32 outscnt; | |
1003 | u32 fwdscnt; | |
1004 | u32 spdhcnt; | |
1005 | u32 spdhmcnt; | |
1006 | }; | |
1007 | ||
1da177e4 | 1008 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1009 | extern int xfrm_state_delete(struct xfrm_state *x); |
4aa2e62c | 1010 | extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1011 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1012 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
a252cc23 | 1013 | extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); |
61f4627b | 1014 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1015 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 LT |
1016 | extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); |
1017 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
72cb6962 | 1018 | extern int xfrm_init_state(struct xfrm_state *x); |
1da177e4 LT |
1019 | extern int xfrm4_rcv(struct sk_buff *skb); |
1020 | extern int xfrm4_output(struct sk_buff *skb); | |
c0d56408 KM |
1021 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1022 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
a252cc23 | 1023 | extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi); |
951dbc8a | 1024 | extern int xfrm6_rcv(struct sk_buff **pskb); |
fbd9a5b4 MN |
1025 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1026 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1027 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1028 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1029 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1030 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1031 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
1da177e4 | 1032 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1033 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1034 | u8 **prevhdr); | |
1da177e4 LT |
1035 | |
1036 | #ifdef CONFIG_XFRM | |
067b207b | 1037 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 LT |
1038 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1039 | extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); | |
1040 | #else | |
1041 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1042 | { | |
1043 | return -ENOPROTOOPT; | |
1044 | } | |
1045 | ||
067b207b | 1046 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1047 | { |
1048 | /* should not happen */ | |
1049 | kfree_skb(skb); | |
1050 | return 0; | |
1051 | } | |
067b207b | 1052 | |
1da177e4 LT |
1053 | static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) |
1054 | { | |
1055 | return -EINVAL; | |
1056 | } | |
1057 | #endif | |
1058 | ||
dd0fc66f | 1059 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4e81bb83 | 1060 | extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1da177e4 | 1061 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1062 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1063 | struct xfrm_selector *sel, | |
ef41aaa0 EP |
1064 | struct xfrm_sec_ctx *ctx, int delete, |
1065 | int *err); | |
1066 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); | |
4aa2e62c | 1067 | int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1068 | u32 xfrm_get_acqseq(void); |
26977b4e | 1069 | void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi); |
161a09e7 JL |
1070 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1071 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 | 1072 | int create, unsigned short family); |
4aa2e62c | 1073 | extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1074 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1075 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1076 | struct flowi *fl, int family, int strict); | |
1da177e4 LT |
1077 | extern void xfrm_init_pmtu(struct dst_entry *dst); |
1078 | ||
80c9abaa SS |
1079 | #ifdef CONFIG_XFRM_MIGRATE |
1080 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1081 | struct xfrm_migrate *m, int num_bundles); | |
1082 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); | |
1083 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1084 | struct xfrm_migrate *m); | |
1085 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1086 | struct xfrm_migrate *m, int num_bundles); | |
1087 | #endif | |
1088 | ||
1da177e4 | 1089 | extern wait_queue_head_t km_waitq; |
5d36b180 | 1090 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1091 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1092 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1093 | |
1094 | extern void xfrm_input_init(void); | |
6067b2ba | 1095 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1096 | |
1097 | extern void xfrm_probe_algs(void); | |
1098 | extern int xfrm_count_auth_supported(void); | |
1099 | extern int xfrm_count_enc_supported(void); | |
1100 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1101 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1102 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1103 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1104 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1105 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1106 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1107 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1108 | ||
07d4ee58 | 1109 | struct hash_desc; |
9409f38a | 1110 | struct scatterlist; |
07d4ee58 HX |
1111 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1112 | unsigned int); | |
1da177e4 | 1113 | |
07d4ee58 HX |
1114 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1115 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1116 | |
1117 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1118 | int family) | |
1119 | { | |
1120 | switch (family) { | |
1121 | default: | |
1122 | case AF_INET: | |
8c689a6e | 1123 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1124 | case AF_INET6: |
1125 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1126 | (struct in6_addr *)b); | |
1127 | } | |
1128 | } | |
1129 | ||
77d8d7a6 HX |
1130 | static inline int xfrm_policy_id2dir(u32 index) |
1131 | { | |
1132 | return index & 7; | |
1133 | } | |
1134 | ||
f8cd5488 JHS |
1135 | static inline int xfrm_aevent_is_on(void) |
1136 | { | |
be33690d PM |
1137 | struct sock *nlsk; |
1138 | int ret = 0; | |
1139 | ||
1140 | rcu_read_lock(); | |
1141 | nlsk = rcu_dereference(xfrm_nl); | |
1142 | if (nlsk) | |
1143 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1144 | rcu_read_unlock(); | |
1145 | return ret; | |
f8cd5488 JHS |
1146 | } |
1147 | ||
1148 | static inline void xfrm_aevent_doreplay(struct xfrm_state *x) | |
1149 | { | |
1150 | if (xfrm_aevent_is_on()) | |
1151 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1152 | } | |
1153 | ||
80c9abaa SS |
1154 | #ifdef CONFIG_XFRM_MIGRATE |
1155 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1156 | { | |
1157 | return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); | |
1158 | } | |
1159 | ||
1160 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1161 | { | |
1162 | int i; | |
1163 | for (i = 0; i < n; i++) | |
1164 | xfrm_state_put(*(states + i)); | |
1165 | } | |
1166 | ||
1167 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1168 | { | |
1169 | int i; | |
1170 | for (i = 0; i < n; i++) | |
1171 | xfrm_state_delete(*(states + i)); | |
1172 | } | |
1173 | #endif | |
f8cd5488 | 1174 | |
1da177e4 | 1175 | #endif /* _NET_XFRM_H */ |